Valve



June 5, 1923.

C. L. M CUEN VALVE Filed Jun 10, 1921 //vv/ -"7vr0R-- CHARLES 4 McCl/EM Arrxs Patented June 5, 1923.

UNITED STATES CHARLES L. MCCUEN, OF CHICAGO, ILLINOIS, ASSIGNOR-TO RESOLUTE MANUFAC TUBING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATIONOF ILLINOIS.

VALVE.

Application filed June 10, 1921. Serial No. 476,376.

To all whom it may concern:

Be it known that I, CHARLES L. MOCUEN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Valves, of which the following is}; specification.

My inventionrelates to valves, more particularly for compressors, air pumps and the like, and the general object of the invention is to provide a construction which will insure'at all times the close seating of the valve when closed. In a co-pending application filed October 11, 1920, Serial No. 416,049, I have shown a compressor of analogous characteristics in which the outlet port is controlled by a valve which overlies the port and moves in a direction normal to the plane of the valve seat. In other words, the valve is fiat and moves flatwise toward and 'from the seat. In-that construction, however. in case any foreign matter lodges between the valve and its seat, the valve is prevented from seating closely, and causes leakage. The object of my present lnvention, more specifically, is to provide a valve which present normally to the valve seat and at'the same time has a rubbing motion in the plane of the seat for preventing the lodging 3 there of any foreign substance. Another object of'the invention is to provide a construction by which the valve may be readily attached and detached. I

I accomplish these objects by the mecha nism illustrated in the accompanying drawings in which-- igure 1 is a general assembly view showing the valve as applied to a compressor.

Figure 2 is a view of the valve cylinder and associated parts looking toward the right in Figure 1.

Figure 3 is a section taken on the line 3-3, Figure 2 and Figure 4 is a perspective view of the bridge which yieldingly holds the valve to its seat.

Like numerals denote like parts throughout the several views.

In the form illustrated, the moving parts are mounted in a housing 1 constructed in two parts adapted to be bolted together. Journaled within this housing is a drive shaft 2 having'an eccentric 3 fastened to it.

-tionary shaft 12 located at the upper end of the housing. This latter shaft is hollow, having a central passage 13 through which the gas or workfluid enters. It will be evident that as the drive shaft 2 rotates, the

plunger will reciprocate within the cylinder and the cylinder will oscillate about shaft 12 as an axis.

Leading from the passage 13 in shaft 12 is a passage 14 which communicates with a passage 16 in the side of the cylinder. Passage 14 is wide enough so that it will be in communication with passage 16 in all positions of the cylinder. The cylinder has an inlet port 18 leading from the outer end of passage 16 to the interior of the cylinder. The parts are so located that When the plunger is at the outer end of its throw the inlet port will be uncovered, as illustrated in Figure 1.

At the inner end of the cylinder is an outlet port 20 which leads to a channel 22,

formed in the side of the cylinder. The bottom of the channel is flat and constitutes a seat fora valve 24:. The valve consists of a flat strip of metal which fits slidingly within the channel. It projects beyond the outer end of the cylinder and is apertured at one end so as to fit over a pin 25 fastened to the eccentric strap. The result is that as. the plunger reciprocates in the cylinder the valve slides within the channel. The length of the valve is such that it always extends far enough to cover port 20.

The outlet valve 24 is held to its seat preferably by an arched spring 30 mounted in a bridge '31. The bridge is fastened to the side of the cylinder by screws 32 or other suitable means, and has a strap 34 struck from it which passes beneath spring 30, thus holding it in close contact with the inner surface of the body of the bridge.

In operation, as shaft 2 rotates the plunger 8 will reciprocate within the cylinder. As the plunger moves inward from the position shown in Figure 1 it will first close the inlet port 18 after which the pressure of gas within the cylinder will force the valve 24 away from its seat and thus open the port. When the plunger has finished its inward stroke and commences its return movement, suction, augmented by the action of spring 30 will promptly close the valve and prevent admission of the working fluid through the outlet port. As soon as the plunger has moved outward far enough to uncover the inlet port 18 the work fluid will rush in through the port from the passages 13 and 16 whereupon the plunger will reverse its movement and repeat the cycle. As valve 24 is connected by pin 25 to the eccentric strap and plunger, it will reciprocate lengthwise in its channel 22 in unison with the plunger, thus producing a rubbing action on the valve seat. This. constant rubbing prevents grit from lodging between the valve and its seat and prevents oil or other liquid from hardening or otherwise interfering with the closing of the valve. Spring 30. being fastened to the cylinder, moves in unison with it and therefore its upper end (which by preference is located in the neighborhood of the outlet port 20) does not shift its position transversely of the port. Thus the pressure of the spring is constant at the area surrounding the port From the foregoing it will be evident that the valve which controls the outlet port is not only automatic in its movement from and toward the port (as it responds to the pressure of gas within the cylinder) but it is also subject to a. longitudinal or rubbing movement which keeps both the valve seat and the valve clean and bright and prevents the deposition of any foreign matter. It will also be evident that it is a simple matterto remove and replace the valve, for this may be accomplished by merely slipping the lower end from pin 25 and sliding the valve lengthwise trom'under the spring. In most cases it is not necessary even to remove the bridge 31 although it may be convenient to do so. Thus the construction is simple and.

effective and the valve and seat keep clean and bright and the valve may be readily renewed at any time.

Having thus described my invention, what memes I claim as new and desire to secure by Letters Patent is:

1. A compressor having a cylinder provided with inlet and outlet ports one of said ports having a fiat valve seat, a valve adapted to move in a direction normal to the surface of the valve seat for opening and closing the port, and a plunger working in said cylinder, the said'valve being also slidable upon its seat, and connected to the plunger whereby a. constant rubbing action is produced.

2. In combination, a cylinder having inlet and outlet ports, a fiat valve adapted to move away from one of the ports for open ing it, a spring for holding the valve to its seat, and means moving in synchronism with the plunger for moving the valve in its own plane transversely to saidport.

3. Incombination, a cylinder having a.

channel in the side and inlet and outlet ports, one of said ports forming a passage between the bottom of the channel and the inside of the cylinder, and a valve seating in the bottom of the channel and yieldingly biased toward the port, the valve being connected to the piston "for moving in unison with it lengthwise of said channel.

4. A compressor having a cylinder provided with a channel in the side and inlet and outlet ports, one of said ports forming a passage between the bottom of the channel, and the inside of the cylinder, a bridge over the, channel, a spring mounted on the bridge, and a valve seating in the channel and adapted to cover the port associated therewith, the valve being attached to the plunger to be moved by it lengthwise of the channel.

'5. A compressor having a cylinder provided with inlet and outlet ports. a valve seating upon the cylinder at one of said ports. the valve being disconncctibly connected to the plunger, means for guiding said valve lengthwise of the cylinder, and means for yieldingly pressing the valve toward the port which it controls.-

CHARLES L. MoCUEN. 

